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  1. <?php
  2. for($i=0; $i<10; $i++)
  3. {
  4.     $str .= "a";
  5. }
  6.  
  7. echo $str;
  8. ?>
Success #stdin #stdout #stderr 0.01s 20568KB
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stdin
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Standard input is empty
stdout
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aaaaaaaaaa
stderr
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PHP Notice:  Undefined variable: str in /home/z5Ctbq/prog.php on line 4
https://ideone.com/PJT90G
language:
PHP (php 7.3.5)
created:
10 years ago
visibility:
public

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